Jeremiah myers



"pziuitrh gisten getest @fitta JEREMIAH MYERS, 0F DOR-CHESTER, MASSACHUSETTS.

Letters .Patent No. 61,233, dated January 15, 1867.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, JEREMIAH Mnns, of Dorchester, in the county.of Norfolk, and State of Massachu- Betts, have invented al1-improved press for forming Hollow Glassware, Ste.; and I do hereby declare that the following, takenin connection with the drawings which accompany and formpart of this specification, is a description of my invention suiiicient to enahlethose skilled in the art to practise it.

This invention relates to the construction of presses, and particularly to that class of plunger presses used in the formation of hollow glassware. l

The invention consists in producing the downward movement of the plunger by means of eccentric or camshaped segment gears, so arranged with respect to each other that, while the work of the plunger is light, as it is during the first part of its downward movement, the force applied will produce a quick movement of the same; while, as the work increases, the eiiicacy ci' the same power applied in the same manner shall increase'in proportion thereto.

The drawing represents, at A, a side elevation of a press embodying my invention. AL denotes a table or frame for supporting the operative parts of the press; Z1 1),-standards or uprights, between which the plunger c is placed, and moved vertically; the plunger being hung upon the foot of a piston or shaft, d, playing vertically through a stationary cross-head, e, placed on top of the standards. This shaft is shown as depending from a movable cross-head, g, to which it is connected hy a screw, L, and nut, i; the position of the'plunger with respect to the cross-head being determined and adjusted by means of this nut and screw, and'this position being main'- tained by means of a check-nut, 7c, as will be readily understood. The cross#head g is mounted on top of two long arms or links, Z, hung upon arms, m, extending from eccentric segment gears, n, fixed on a rocker-shaft, o, `journalled in bearings, p, under the frame a. Parallel with this shaft, o, is another shaft, g, bearing eccentric gear segments, r, which mosh into the segments a, as seen at A, one or both ends ot' the shaft having a long levc1,s, by which the shaft, with its gears, r, is turned. From inspection ofthe drawings at A it; will be observed that, when the plunger or platen is at its highest position, the teeth of the operating segment r most remote from their centre of motion or fulerum, are engaged with the teeth of the Segment connected to the platen nearest to the centre, in consequence ot which, during the iirstpart of the movement of the lever s, along arm of the operating lever (or segment) is working upon a short arm of the other lever, producing great movement of the platen with little force, while the efficacy of the power is increased as the lever s is depressed, the operating arm of the segment or lever r shortening, while the arm of the other segment (or lever) lengthens, thus producing great pressure upon the platen as the requirement for pressure increases.

.We claim the arrangement and combination of the eccentrlc segment gears 'n and 7 with the platen or `plunger c, connecting-rods Z, and lever s, the whole being connected to operate together, substantially as set forth,

JEREMIAH MYERS, Witnesses F. GouLn, S. B. Kronen. 

